Again--- in order to understand the clan system of the Cherokee and most of the other native tribes, I would suggest that you read the same book: "Myths of the Cherokees and Sacred Formulas of the Cherokee" by James Mooney.
As for Matoy's clan- that would be immaterial because the clan comes through the mother's line. You would have to know the clan of the several different mothers of his many children, and considering the lack of records at that early time in our history (no written language until later), I've never seen any (believable!) documentation on this.
Actually, it's never been that important to me, and the Matoy family is one of my lines in the Cherokee tribe.